CN110737350A - Display device with touch sensor - Google Patents

Display device with touch sensor Download PDF

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Publication number
CN110737350A
CN110737350A CN201910628480.9A CN201910628480A CN110737350A CN 110737350 A CN110737350 A CN 110737350A CN 201910628480 A CN201910628480 A CN 201910628480A CN 110737350 A CN110737350 A CN 110737350A
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CN
China
Prior art keywords
touch
electrode connected
signal
node
input terminal
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Granted
Application number
CN201910628480.9A
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Chinese (zh)
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CN110737350B (en
Inventor
金载升
李挥得
李杨植
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LG Display Co Ltd
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LG Display Co Ltd
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Publication of CN110737350A publication Critical patent/CN110737350A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
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    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
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    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
    • H01L29/76—Unipolar devices, e.g. field effect transistors
    • H01L29/772—Field effect transistors
    • H01L29/78—Field effect transistors with field effect produced by an insulated gate
    • H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
    • H01L29/78645—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with multiple gate
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
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    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
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    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Mathematical Physics (AREA)
  • Ceramic Engineering (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

Embodiments of the present disclosure may provide display devices including a substrate including an active area in which pixels connected to gate lines and data lines crossing each other are disposed and a non-active area in which lines for transmitting signals for driving the plurality of pixels are disposed, a touch signal generating circuit disposed on the non-active area and receiving a touch clock signal and outputting a touch driving signal, and a touch sensor unit for receiving the touch driving signal and generating touch information regarding a touch point on the active area.

Description

Display device with touch sensor
Cross Reference to Related Applications
This application claims priority to korean patent application No.10-2018-0084393, filed on 19.7.2018, the entire contents of which are incorporated herein by reference as if fully set forth herein as korean patent application .
Technical Field
The present disclosure relates to a display device having a touch sensor.
Background
As the information society develops, the demand for display devices for displaying images increases in various forms. For this purpose, various types of display devices, such as liquid crystal display devices (LCDs), plasma display devices, and organic light emitting display devices (OLEDs), have been used.
Among these display devices, an organic light emitting display device has a self-emission characteristic, and has excellent response speed, viewing angle, and color reproducibility, and can be made thin.
The display device may operate in response to input signals received through various input devices such as a keyboard and a mouse. By touching the screen using the touch panel, the display device can intuitively and conveniently input a user's command. The touch panel may be provided on a screen of the display device and allow a user to input a user's command by touching a specific point on the screen of the display device. Such a touch panel may be embedded in and integrated with a display device. The touch panel integrated in the display device may be referred to as a touch sensor.
The touch sensor includes a plurality of touch electrodes, and the touch electrodes may receive a touch driving signal through a touch line and output a touch sensing signal. In recent years, due to an increasing trend in the size of display devices, the number of touch electrodes provided on the display devices may increase, so that the number of touch lines for transmitting touch driving signals to the touch electrodes should increase. As a result, the number of touch driving signals output from the touch IC also increases. In addition, a plurality of touch driving signals may be simultaneously output to sense touches occurring at various points on the display device. As a result, since the touch driving circuit should output a large number of touch driving signals, a problem of an increase in the size of the touch driving circuit may occur.
Disclosure of Invention
An aspect of an embodiment of the present disclosure is to provide kinds of display devices including a touch sensor capable of reducing the size of a touch control unit.
Another aspect of embodiments of the present disclosure is to provide display devices having a touch sensor capable of reducing manufacturing costs.
Another aspect of embodiments of the present disclosure is to provide display devices that include thin touch sensors.
According to an aspect of the present disclosure, there may be provided kinds of display devices including a substrate including an active area in which pixels connected to gate lines and data lines crossing each other are arranged and a non-active area in which lines for transmitting signals for driving a plurality of pixels are disposed, a touch signal generating circuit disposed on the non-active area and receiving a touch clock signal and outputting the touch driving signal, and a touch sensor unit for receiving the touch driving signal and generating touch information on a touch point on the active area.
According to another aspect of the present disclosure, there may be provided display devices including a display panel including an active area in which gate lines and data lines are disposed and a non-active area in which a touch signal generation circuit for receiving a touch clock signal and outputting the touch signal is disposed, a display driving circuit for supplying a gate signal applied to the gate lines and a driving signal corresponding to a data signal applied to the data lines, a touch sensor unit including a plurality of touch electrodes for receiving the touch signal from the touch signal generation circuit and generating information on a touch point on the display panel, and a touch driving circuit for supplying the touch clock signal to the touch signal generation circuit.
According to an embodiment, the display device further comprises: a gate signal generation circuit for receiving the drive signal from the display drive circuit and generating a gate signal.
According to the embodiments, it is possible to provide a display device having a touch sensor capable of correctly recognizing a touch by causing a change in capacitance of a surrounding point.
According to the embodiment, it is possible to provide a display device having a touch sensor capable of reducing the size of a touch control unit.
According to the embodiment, it is possible to provide a display device having a touch sensor capable of reducing manufacturing costs.
According to the embodiment, it is possible to provide a display device including a thin touch sensor.
Drawings
The above and other aspects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:
fig. 1 is a block diagram showing an embodiment of a display device having a touch sensor unit according to the present embodiment;
FIG. 2 is a plan view showing embodiments of the display panel shown in FIG. 1;
FIG. 3 is a plan view illustrating an th embodiment of the touch sensor unit shown in FIG. 1;
fig. 4 is a plan view illustrating a second embodiment of the touch sensor unit shown in fig. 1;
FIG. 5 is a conceptual diagram illustrating an th embodiment of the operation of the touch driver circuit and the touch signal generator shown in FIG. 1;
FIG. 6 is a conceptual diagram illustrating a second embodiment of the operation of the touch driving circuit and the touch signal generator shown in FIG. 1;
FIG. 7 is a block diagram illustrating an embodiment of the touch driver circuit of FIG. 1;
FIG. 8 is a circuit diagram illustrating an embodiment of the touch signal generator shown in FIG. 2;
FIG. 9 is a timing diagram illustrating an th embodiment of the operation of the touch signal generator shown in FIG. 8;
FIG. 10 is a timing diagram illustrating an embodiment of touch signals output from the touch signal generator shown in FIG. 6;
fig. 11 is a perspective view illustrating an embodiment of a structure in which a touch panel (TSP) is embedded in a display panel (DISP) according to an embodiment of the present invention;
fig. 12 is a plan view illustrating an th embodiment of a type of Touch Electrode (TE) provided on a display panel (DISP) according to an embodiment of the present invention;
fig. 13 is a plan view illustrating a second embodiment of the type of Touch Electrode (TE) provided on the display panel (DISP) according to an embodiment of the present invention;
fig. 14 is a plan view illustrating a third embodiment of the type of Touch Electrode (TE) provided on the display panel (DISP) according to an embodiment of the present invention; and
fig. 15 is a sectional view showing an example of a section of a display device according to an embodiment of the present invention.
Detailed Description
In the following description of the present disclosure, when elements of the drawings are denoted by like reference numerals, although they are illustrated in different drawings, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present disclosure rather unclear.
In addition, where a particular structural element is described as being "connected to," "coupled to," or "in contact with" another structural elements, it should be construed that another structural elements may be "connected to," "coupled to," or "in contact with" the structural element, and that the particular structural element is directly connected to another structural element or in direct contact with another structural element.
Fig. 1 is a structural diagram showing an embodiment of a display device having a touch sensor unit according to the present embodiment, and fig. 2 is a plan view showing embodiments of the display panel shown in fig. 1.
Referring to fig. 1 and 2, the display device 100 may include: a display panel 110 for displaying an image; a display driving circuit 130a for supplying a driving signal corresponding to a gate signal applied to the Gate Line (GL) and a data signal applied to the Data Line (DL); a touch sensor unit 120 including a plurality of touch electrodes for receiving touch signals from the touch signal generation circuit and generating information on touch points on the display panel 110; and a touch driving circuit 130b for supplying a touch clock signal to the touch signal generating circuit. In addition, the display device 100 may include a controller or control unit 140 for controlling the display driving circuit 130a and the touch driving circuit 130 b. The display driving circuit 130a, the touch driving circuit 130b, and the control unit 140 may be implemented as an integrated circuit, but may not be limited thereto. The display device 100 may be a liquid crystal display device or an organic light emitting display device, but is not limited thereto.
The display panel 110 may include an Active Area (AA) and a non-active area (NAA) disposed on a substrate 111. The Active Area (AA) may be disposed at the center of the substrate 111 and the non-active area (NAA) may be formed at the edge of the substrate 111, but may not be limited thereto. The plurality of Gate Lines (GL) and the plurality of Data Lines (DL) are arranged to intersect each other, and the plurality of subpixels (P) may be arranged in regions where the plurality of Gate Lines (GL) and the plurality of Data Lines (DL) intersect. In the case where the display device 100 is an organic light emitting display device, each sub-pixel (P) of the display panel 110 may include a light emitting element and a pixel circuit (not shown) for supplying a driving current to the light emitting element. The light emitting element may be an Organic Light Emitting Diode (OLED), but is not limited thereto. The organic light emitting diode may include an organic layer, and an anode electrode and a cathode electrode through which current flows in the organic layer. The pixel circuits may be connected to a power supply or a line for transmitting signals. The pixel circuit may be connected to a Gate Line (GL) for transmitting a gate signal and a Data Line (DL) for transmitting a data signal. Further, the pixel circuit may receive a data signal in response to a gate signal, and may generate and supply a driving current to the light emitting element. In addition, the pixel circuit may be connected to a separate power line (not shown) to receive the driving current. The touch electrode may be disposed on an upper portion of the Active Area (AA). The in-panel Gate (GIP) may be disposed in the non-active region (NAA), and the in-panel Gate (GIP) may transmit a gate signal to the pixel in response to a signal received from the circuit unit shown in fig. 1. The power line, the clock line, the Gate Line (GL), the Data Line (DL), and the touch line may be disposed in the non-active area (NAA), however, the present invention is not limited thereto. Further, in the non-active area (NAA), a light emitting layer and a cathode electrode included in the pixel may be provided. Herein, the Active Area (AA) and the non-active area (NAA) may also be denoted as a display area and a non-display area, respectively.
The pad 112 may be disposed under a non-active area (NAA) of the substrate 111, as shown in fig. 2. The pads 112 may be connected to output terminals of the display driving circuit 130a and the touch driving circuit 130b, respectively. A region where the pad 112 is disposed on the substrate 111 may be referred to as a pad region. The pad 112 is shown as being connected to the data line DL, but is not limited thereto. The pads 112 may be disposed to correspond to all lines for transmission and reception to and from the display driving circuit 130a and the touch driving circuit 130b shown in fig. 1.
The display driving circuit 130a may receive a data control signal to generate a data signal and may receive a gate control signal to output a gate signal. When the gate signal generating circuit 211 is disposed on the display panel 110, the display driving circuit 130a may transmit a gate control signal to the gate signal generating circuit 211 to output a gate signal. The gate signal generating circuit 211 may be referred to as a Gate In Panel (GIP). The gate control signal may be a clock, a start pulse, or a synchronization signal. However, the present invention is not limited thereto.
The touch sensor unit 120 may sense a touch point of the display panel 110 the touch sensor unit 120 may include a plurality of touch electrodes disposed on the display panel 110 here, the touch sensor unit 120 is shown as parts on the display panel 110, but this is conceptual only, and is not limited thereto.
The touch driving circuit 130b may transmit/receive a touch signal to/from the touch sensor unit 120 in response to a touch control signal. The touch signal may include a touch driving signal and a touch sensing signal.
The display driving circuit 130a and the touch driving circuit 130b may be connected to the display panel 110 in the form of a Chip On Film (COF). That is, the display driving circuit 130a and the touch driving circuit 130b are disposed on the respective films 131, and the films 131 may be connected to the substrate 111. The film 131 may be connected to a Source Printed Circuit Board (SPCB)132 and the display driving circuit 130a and the touch driving circuit 130b may receive signals through the SPCB 132. Here, although an embodiment in which the number of the display driving circuits 130a and the number of the touch driving circuits 130b are two is illustrated as an example, the present invention is not limited thereto. Although the display driving circuit 130a and the touch driving circuit 130b are shown to be alternately arranged, the present invention is not limited thereto. The number of the display driving circuits 130a and the number of the touch driving circuits 130b are shown to be the same, but the present invention is not limited thereto. The number of the display driving circuits 130a and the number of the touch driving circuits 130b may be determined depending on the size and/or resolution of the display panel 110 and the size of the touch sensor unit 120.
The display device 100 may further include a control unit 140. The control unit 140 may control the display driving circuit 130a and the touch driving circuit 130 b. The control unit 140 may include a timing controller (T-CON)140a and a Micro Control Unit (MCU)140 b. The T-CON 140a and the MCU 140b may control the display driving circuit 130a and the touch driving circuit 130b, respectively. The control unit 140 may be disposed on a Control Printed Circuit Board (CPCB)141, and the CPCB 141 may be connected to the SPCB 132 through a Flexible Flat Circuit (FFC) 142.
Fig. 3 is a plan view illustrating an th embodiment of the touch sensor unit shown in fig. 1.
Referring to fig. 3, the touch sensor unit 120 may be disposed on the substrate 111 and may include a plurality of th electrodes TEa and a plurality of second electrodes TEb the plurality of th electrodes TEa may correspond to touch driving electrodes and the plurality of second electrodes TEb may correspond to touch sensing electrodes the plurality of th electrodes TEa are connected by a connection part 322 in a row direction to form a plurality of touch electrode lines in a row direction and the plurality of second electrodes TEb may be connected by a connection part 322 in a column direction to form a plurality of touch electrode lines, here, the number of th electrodes TEa and the number of second electrodes TEb may correspond to a size of the substrate 111 and are not limited to the illustrated example.
The th electrode TEa may receive a touch driving signal and the second electrode TEb may transmit a touch sensing signal corresponding to the touch driving signal the th and second electrodes TEa may be formed on the same layer on the display panel 110, however, the present invention is not limited thereto.
The th electrode TEa may be connected to the touch lines 321a and 321b, and the second electrode TEb may be connected to the touch line 321c the touch lines 321a and 321b connected to the th electrode TEa may transfer a touch driving signal from the touch driving circuit 130b shown in FIG. 1 to the th electrode TEa the touch line 321c connected to the second electrode TEb may transfer a touch sensing signal to the touch driving circuit 130b shown in FIG. 1, and also, the touch line 321b connected to the th electrode TEa may be connected to the touch signal generating circuit.
The connection portion 322 may connect th electrode TEa to other 0 th electrodes, and in addition, the connection portion 322 may connect second electrode TEb to other second electrodes, the connection portion 322 may cross each other, and thus, in order to prevent the th electrode TEa and the second electrode TEb from being directly connected to each other, the connection portion 322 connecting the th electrode TEa may be formed on a different layer from the th electrode TEa and the second electrode TEb, and the th electrode TEa and the connection portion 322 may be connected through a via hole, the connection portion 322 connecting the second electrode TEb may be formed on the same layer as the th electrode TEa and the second electrode TEb to connect the second electrode TEb in the same layer, and for this purpose, an insulation layer (not shown) may be disposed between the connection portion 322 connecting the th electrode TEa and the connection portion 322 connecting the second electrode TEb.
The th and second electrodes TEa and TEb may be formed by patterning a conductive metal layer the th and second electrodes TEa and TEb may be formed of a transparent material such as Indium Tin Oxide (ITO), the patterned th and second electrodes TEa and TEb may include an electrode pattern formed in a mesh form, and the th and second electrodes TEa and TEb may include a plurality of openings light emitted from the display device may be transmitted through the th and second electrodes TEa and TEb, or may be emitted to the outside through the th and second electrodes TEa and TEb made of an ITO electrode or a plurality of openings included in the th and second electrodes TEa and TEb.
The th and second electrodes TEa and TEb may be connected to the driving line 321a for applying a driving signal and the sensing line 321b, and a sensing signal generated corresponding to a touch sensed by the touch electrode is transmitted to the sensing line 321 b.
Fig. 4 is a plan view illustrating a second embodiment of the touch sensor unit shown in fig. 1.
Referring to fig. 4, the touch sensor unit 120 may be disposed on a substrate 111, and a plurality of touch electrodes TE having a predetermined area may be arranged on the substrate 111 in a matrix form, in addition, each touch electrode TE may be connected to a plurality of touch lines 420, which receive touch sensing signals from the touch electrodes TE, the touch lines 420 may be disposed under the touch electrodes TE and may touch portions of the area of the touch electrodes TE, the touch electrodes TE and the touch lines 420 may be installed in the display panel 110 such that the display device does not include a separate touch panel on the display panel 110, and thus, a thin display device may be implemented.
Fig. 5 is a conceptual diagram illustrating an th embodiment of the operation of the touch driving circuit and the touch signal generator shown in fig. 1.
Referring to fig. 5, the touch driving circuit 530 may output touch clocks TCLK, and the touch signal generating circuit 522 may generate a plurality of touch driving signals TX1, TX2,. multidrug-mother, TXn-1, TXn using touch clocks TCLK received from the touch driving circuit 530, the plurality of touch driving signals output from the touch signal generating circuit 522 may be respectively supplied to the plurality of touch lines 321b shown in fig. 3 or the touch lines 420 shown in fig. 4, the sequential outputs of the plurality of touch driving signals TX1, TX2,. multidrug-mother, TXn-1, TXn using touch clocks TCLK may be referred to as single touch driving, here, the touch signal generating circuit 522 is shown as blocks, but the present invention is not limited thereto, and touch signal generating circuits 522 may be connected to touch driving lines.
Fig. 6 is a conceptual diagram illustrating a second embodiment of the operation of the touch driver circuit and the touch signal generator shown in fig. 1.
Referring to fig. 6, the touch driving circuit 630 may output two touch clocks TCLK1 and TCLK2, and the touch signal generating circuit 622 may generate and output a plurality of touch driving signals TX1, TX2,.,. TXn-1, TXn using the two touch clocks TCLK1 and TCLK2 received from the touch driving circuit 630, for the plurality of touch driving lines receiving the plurality of touch driving signals TX1, TX2,.,. TXn-1, TXn, two lines are set as groups, and each group may sequentially receive the touch driving signals.
Here, the number of touch clocks TCLK1 and TCLK2 output to the touch driving circuit 630 is shown as two, but is not limited thereto, for example, the number of touch clocks TCLK1 and TCLK2 output to the touch signal generating circuit 622 may be four, six, eight, etc., in addition, the number of touch driving lines set to groups may correspond to the number of touch clocks TCLK1 and TCLK 2.
Fig. 7 is a block diagram illustrating an embodiment of a touch driving circuit in fig. 1.
Referring to fig. 7, the touch driving circuit 730 may output th power supply VDD, a second power supply VSS, a th control signal VST, a second control signal RST, and two touch clocks TCLK1 and tclk2. the voltage level of the th power supply VDD may be higher than that of the second power supply VSS.
In case that the touch driving circuit 730 is driven by a single touch to sense touch points during touch sensing periods, the control unit 140 may output touch clocks tclk1 in case that the touch driving circuit 730 is driven by a multi touch to sense a plurality of touch points during touch sensing periods, two touch clocks TCLK1 and tclk2 may be output in case that the touch driving circuit 730 is driven by a multi touch to sense a plurality of touch points during touch sensing periods.
Assuming that the control unit 140 outputs the touch driving signal and sixteen touch lines for supplying the touch driving signal to the touch sensor unit 120 are provided, the touch driving circuit 730 may need to include sixteen pins connected to the 16 touch lines and outputting the touch driving signal, however, if the touch driving circuit 730 does not output the touch driving signal, only output terminals for outputting touch clocks may be needed in the case of single-touch driving.
Fig. 8 is a circuit diagram illustrating an embodiment of the touch signal generator shown in fig. 2.
Referring to FIG. 8, the touch signal generating circuit 820 may include a second transistor T having a 0 th electrode connected to a second input terminal IN to which a 1 st power supply VDD is supplied, a second electrode connected to a 3 rd node (Q), and a gate electrode connected to the second input terminal IN to which a 4 th control signal VST is transferred, and a second transistor T having a 6 th electrode connected to a 5 th node (Q), a second electrode connected to a third input terminal IN to which a second power supply is supplied, and a gate electrode connected to a second node (QB). the touch signal generating circuit 820 may include a third transistor T having an 8 th electrode connected to a 7 th node (Q), a second electrode connected to the third input terminal IN to which a second power supply VSS is input, and a gate electrode connected to a fourth input terminal, a fourth transistor T having a gate electrode connected to a VSS terminal VDD 9, a fifth input terminal VDD, a gate electrode connected to a second input terminal VDD, a second input terminal Q, a gate electrode connected to a fifth input terminal VDD, a gate electrode connected to a second input terminal Q, and a gate electrode connected to a second input terminal Q, a gate electrode connected to a fifth input terminal VDD, a gate electrode connected to a second input terminal VDD, a second input terminal Q, a gate electrode connected to a fifth input terminal Q, a gate electrode connected to a second input terminal Q, a gate electrode connected to a fifth input terminal, a gate electrode connected to a gate electrode of a fifth input terminal Q, a fifth input terminal Q, a second input terminal, a fifth input terminal, a gate electrode connected to a second input terminal VDD terminal, a second input terminal, a gate electrode connected to a second input terminal, and a second input terminal, a gate electrode connected.
The voltage level of the trigger driving signal may be output to be higher than the voltage level of the touch clock signal TCLK input from the fifth input terminal IN5, corresponding to the parasitic capacitor CP1 formed between the fifth input terminal IN5 and the node (Q) and the parasitic capacitor CP2 formed between the output terminal OUT and the node (Q).
Fig. 9 is a timing diagram illustrating an th embodiment of the operation of the touch signal generator shown in fig. 8.
In fig. 9, (a) is a timing diagram showing an example of signals input to the touch signal generation circuit 820, and (B) is a timing diagram showing voltages applied to the th node (Q) and the second node (QB) of the touch signal generation circuit 820, (C) is a timing diagram showing a voltage of the output terminal OUT of the touch signal generation circuit 820, as shown in (a), the touch signal generation circuit 820 may not receive the th control signal VST, the second control signal RST and the touch clock signal TCLK in the time interval a, the touch signal generation circuit 820 may receive the th control signal VST in the second time interval B and may not receive the second control signal RST and the touch clock signal TCLK in the third time interval C, the touch signal generation circuit 820 may receive the touch clock signal TCLK and may not receive the th control signal VST and the second control signal tcrst in the fourth time interval D.
If the touch signal generating circuit 820 does not receive the th control signal VST and the second control signal RST in the th time interval a, the 0 th transistor T1 and the fourth transistor T4 may be in an off state, if the th transistor T1 is off, the th power source VDD is not transferred to the th node (Q), at this time, the fourth transistor T4 may remain in an on state, and the voltage of the th power source VDD may be applied to the second node (QB), and thus, as shown in (b), the second node (QB) may be in a high state in the th time interval a, if the second node (QB) is in a high state, the second transistor T2 may be in an on state, if the second transistor T2 is in an on state, the voltage of the second power source VSS may be transferred to the th node (Q) th node, as a result, the th node (Q) may be in a low state, as shown in (b), when the sixth transistor T is in a low state, the 6 may be turned off, and then output as shown in a 6.
Also, as shown in (a), the th control signal VST in a high state is transmitted to the touch signal generating circuit 820 and the second control signal RST is not transmitted in the second time interval B. in addition, the touch clock signal TCLK is not transmitted. if the th control signal VST in a high state is transmitted, the th transistor T1 is turned on and the th power supply VDD voltage is transmitted to the th node (Q). therefore, as shown in (B), the th node (Q) may rise to reach the th power supply VDD voltage level, as shown in (B), the fifth transistor T45 may be turned on when the th node (Q) voltage level becomes the th power supply VDD voltage, as shown in (B), the second power supply is supplied to the second node (QB) and the second node (QB) has the second power supply voltage level, as shown in (B), as the second node (T5) has the second power supply voltage level, as shown in (QB) is turned on, the second power supply is supplied to the second node (QB) and the second transistor T may be turned off at 3638, as shown in 369637, the touch signal output may be output from the second transistor T7, though the second transistor T9638 may be turned off in a sixth time interval B, the touch signal output transistor T9638 may be output as shown in 3638, also be output by the touch signal output transistor T3638, as shown in 3638, which is not output at the touch signal output at.
IN addition, as shown IN (a), IN a third time interval C, the th control signal VST and the second control signal RST may not be transmitted and the touch clock signal TCLK may be transmitted the th control signal VST may be IN a turn-off state if the th transistor T1 is not transmitted the third transistor T3 may be IN a turn-off state if the second control signal RST is not transmitted the th node (Q) voltage may maintain the high voltage level of the second period B even if the th transistor T1 is turned off because the third transistor T3 is IN a turn-off state and thus the fifth transistor T5 may be maintained IN a turn-on state so that the voltage of the second node (QB) may have the voltage level of the second power supply even if the th transistor T1 is turned off the seventh transistor T7 th may maintain the turn-off state when the touch clock signal TCLK is input through the fifth input terminal IN5, the parasitic capacitor CP 23 st node (Q) may be increased by the parasitic capacitor CP 8, the result that the second node (Q) voltage may be output a higher voltage level than the parasitic voltage level of the parasitic capacitor CP 638, the parasitic voltage output voltage level when the touch clock signal TCLK is output voltage of the parasitic voltage V639 th node (Q) and the parasitic voltage output voltage level may be higher than the parasitic voltage level of the touch clock signal output voltage level when the touch clock signal RST.
In addition, as shown in (a), in the fourth time interval D, the th control signal VST and the touch clock signal TCLK are not transmitted and the second control signal RST is transmitted in a high state, since the th control signal VST is not transmitted, the th transistor T1 may maintain a turn-off state, however, since the second control signal RST is transmitted, the third transistor T3 is turned on and the th node (Q) may be discharged through the third transistor T3, if the voltage of the th node (Q) is discharged, the fifth transistor T5 and the sixth transistor T6 may be turned off, when the fifth transistor T5 is turned off, the th power supply VDD may be in a high state through the fourth transistor T4 and thus the seventh transistor T7 may be in a turn-on state, accordingly, the output terminal OUT may have a voltage level of the second power supply VSS, although the maximum value of the voltage levels of the th control signal VST, the second control signal RST and the touch clock TCLK is shown as the power supply voltage level , the present invention is not limited to this.
FIG. 10 is a timing diagram illustrating an embodiment of touch signals output from the touch signal generator shown in FIG. 6.
Referring to fig. 10, the touch signal generation circuit 622 may perform multi-point driving in which touch signals are simultaneously supplied to two touch driving lines. The touch signal generation circuit 622 may output a plurality of touch drive signals TX 1. The number of touch driving signals output from the touch signal generation circuit 622 may be shown as eighteen, but the present invention is not limited thereto.
The third touch driving signal TX3 and the fourth touch driving signal TX4 may partially overlap the th touch driving signal TX1 and the second touch driving signal TX2, for example, the fourth touch driving signal TX1 and the third touch driving signal TX3 may partially overlap the TX th touch driving signal TX1 and the second touch driving signal TX2 in the second time interval TD2, the third touch driving signal TX3 and the fourth touch driving signal TX 8656 may be output simultaneously with the touch driving signals TX 8672, although the touch driving signals TX1 and the second touch driving signal TX4 may be output simultaneously with the touch driving signals TX 8672, the touch driving signals TX1 and the second touch driving signal TX2 may be output simultaneously with the same phase in the th time interval TD1 and the same phase in the second time interval TD 2.
Fig. 11 is a perspective view illustrating an embodiment of a structure in which a touch panel (TSP) is embedded in a display panel (DISP) according to an embodiment of the present invention.
Referring to fig. 11, in an Active Area (AA) of a display panel (DISP), a plurality of SUB-pixels (SP) may be disposed on a Substrate (SUB), each of the SUB-pixels (SP) may include a light emitting Element (ED), an th transistor (M1) for driving the light emitting Element (ED), a second transistor (M2) for transferring a data Voltage (VDATA) to a th node (N1) of a th transistor (M1), and a storage capacitor (Cst) for maintaining a constant voltage for frames.
The th transistor (M1) may include a th node (N1) to which the data voltage is applied, a second node (N2) electrically connected to the light emitting Element (ED), and a third node (N3) to which the driving voltage (ELVDD) from the Driving Voltage Line (DVL) is applied (N3), the th node (N1) may be a gate node, the second node (N2) may be a source node or a drain node, and the third node (N3) may be a drain node or a source node, the th transistor (M1) may also be referred to as a driving transistor for driving the light emitting Element (ED).
The light emitting Element (ED) may include an th electrode (e.g., an anode electrode), a light emitting layer, and a second electrode (e.g., a cathode electrode). the th electrode may be electrically connected to the second node (N2) of the th transistor (M1), and a reference voltage (ELVSS) may be applied to the second electrode.
The second transistor (M2) may be controlled to be turned on and off by a SCAN Signal (SCAN) applied through a Gate Line (GL), and the second transistor (M2) may be electrically connected between a -th node (N1) of the -th transistor (M1) and a Data Line (DL). the second transistor (M2) may also be referred to as a switching transistor.the second transistor (M2) is turned on by the SCAN Signal (SCAN) and transmits a data Voltage (VDATA) supplied from the Data Line (DL) to a -th node (N1) of the -th transistor (M1).
The storage capacitor (Cst) may be electrically connected between the th node (N1) and the second node (N2) of the th transistor (M1).
Each sub-pixel (SP) may have a 2T1C structure including two transistors (M1, M2) and capacitors (Cst), as shown in fig. 11, and in cases, or more transistors or or more capacitors.
The storage capacitor (Cst) may not be a parasitic capacitor (e.g., Cgs, Cgd), which is an internal capacitor existing between the th node (N1) and the second node (N2) of the th transistor (M1), but may be an external capacitor intentionally designed to be external to the th transistor (M1).
Each of the th transistor (M1) and the second transistor (M2) may be an n-type transistor or a p-type transistor.
As described above, circuit elements such as the light emitting Element (ED), two or more transistors (M1, M2), and or more capacitors (Cst) may be disposed in the display panel (DISP), such circuit elements (particularly, the light emitting element ED) may be susceptible to external moisture or oxygen, and thus, an Encapsulation (ENCAP) or an encapsulation layer for preventing external moisture or oxygen from being introduced into the circuit elements (particularly, the light emitting element ED) may be disposed on the display panel (DISP).
The Encapsulation (ENCAP) may be a single layer or may be multiple layers.
For example, where the package (ENCAP) includes multiple layers, the package (ENCAP) may include or more inorganic package layers and or more organic package layers.
An th inorganic encapsulation layer may be formed on the second electrode (e.g., cathode electrode) so as to be closest to the light emitting Element (ED). th inorganic encapsulation layer may be formed of an inorganic insulating material capable of being deposited at a low temperature, such as silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiON), or aluminum oxide (Al2O 3). accordingly, since the th inorganic encapsulation layer is deposited in a low temperature atmosphere, damage to a light emitting layer (organic light emitting layer) susceptible to high temperature may be prevented during deposition of the th inorganic encapsulation layer.
The organic encapsulation layer may have a smaller area than the th inorganic encapsulation layer and may be formed to expose both ends of the th inorganic encapsulation layer.
The second inorganic encapsulation layer may be formed on the organic encapsulation layer so as to cover upper and side surfaces of the organic encapsulation layer and th inorganic encapsulation layer, respectively.
In the touch display device according to an embodiment of the present invention, the touch panel (TSP) may be formed on the package (ENCAP).
That is, in the touch display device, a touch sensor structure such as a plurality of Touch Electrodes (TE) forming a touch panel (TSP) may be disposed on a package (ENCAP).
In touch sensing, a touch driving signal or a touch sensing signal may be applied to a Touch Electrode (TE). Therefore, in touch sensing, a potential difference may be formed between the Touch Electrode (TE) and the cathode electrode with the Encapsulation (ENCAP) disposed therebetween, and unnecessary parasitic capacitance may be generated. Since the parasitic capacitance may reduce the touch sensitivity, the distance between the Touch Electrode (TE) and the cathode electrode may be set to a predetermined value (e.g., 5 μm) or more. For this, for example, the thickness of the encapsulation layer (ENCAP) may be designed to be at least 5 μm or more.
Fig. 12 is a plan view illustrating th embodiment of the type of Touch Electrode (TE) provided on the display panel (DISP) according to an embodiment of the present invention, and fig. 13 is a plan view illustrating a second embodiment of the type of Touch Electrode (TE) provided on the display panel (DISP) according to an embodiment of the present invention fig. 14 is a plan view illustrating a third embodiment of the type of Touch Electrode (TE) provided on the display panel (DISP) according to an embodiment of the present invention.
As shown in fig. 12, each of the Touch Electrodes (TE) disposed on the display panel (DISP) may be a plate-shaped electrode metal having no opening. In this case, each Touch Electrode (TE) may be a transparent electrode. That is, each Touch Electrode (TE) may be composed of a transparent electrode material so that light emitted from the plurality of sub-pixels (SP) disposed below may be transmitted upward.
Alternatively, as shown in fig. 13, each of the Touch Electrodes (TE) disposed on the display panel (DISP) may be patterned into a mesh type to form an Electrode Metal (EM) having two or more Openings (OA).
The Electrode Metal (EM) corresponds to a substantial Touch Electrode (TE) and is a portion to which a touch driving signal is applied or a touch sensing signal is detected.
As shown in fig. 13, in the case where each Touch Electrode (TE) is an Electrode Metal (EM) patterned into a mesh type, two or more Openings (OA) may exist in the area of the Touch Electrode (TE).
Each of the at least two Openings (OA) in each Touch Electrode (TE) may correspond to a light emitting region of or more sub-pixels (SP). that is, the plurality of Openings (OA) may be paths through which light emitted from the plurality of sub-pixels (SP) disposed below passes.
The Electrode Metal (EM) corresponding to each Touch Electrode (TE) may be positioned on a bank disposed in an area other than the light emitting area of the two or more sub-pixels (SP).
Meanwhile, as a method of forming the plurality of Touch Electrodes (TE), after the Electrode Metal (EM) is formed into a wide mesh shape, the Electrode Metal (EM) may be cut into a predetermined pattern to electrically separate the Electrode Metal (EM) to thereby form the plurality of Touch Electrodes (TE).
The outline shape of the Touch Electrode (TE) may be a square, such as a diamond, a rhombus, or other shapes, such as a triangle, a pentagon, or a hexagon.
Referring to fig. 14, in the area of each Touch Electrode (TE), there may be a mesh-type Electrode Metal (EM) and at least Dummy Metals (DM) separated from the mesh-type Electrode Metal (EM).
The Electrode Metal (EM) is a portion corresponding to the substantial Touch Electrode (TE), and is a portion to which a touch driving signal is applied or a touch sensing signal is detected. Meanwhile, although the Dummy Metal (DM) may exist in the area of the Touch Electrode (TE), the touch driving signal is not applied to the Dummy Metal (DM) and the touch sensing signal is not detected at the Dummy Metal (DM). That is, the Dummy Metal (DM) may be an electrically floating metal portion.
Accordingly, the Electrode Metal (EM) may be electrically connected to the Touch Driving Circuit (TDC), but the Dummy Metal (DM) is not electrically connected to the Touch Driving Circuit (TDC).
At least Dummy Metals (DM) may exist in a state of being disconnected from the Electrode Metal (EM) in each area of each Touch Electrode (TE).
Alternatively, at least Dummy Metals (DM) may exist only in a state disconnected from the Electrode Metal (EM) in the area of each of of all Touch Electrodes (TE) — that is, the Dummy Metals (DM) may not exist in the area of of the Touch Electrodes (TE).
As shown in fig. 13, regarding the role of the Dummy Metal (DM), in the case where there is no dummy metal DM in the area of the Touch Electrode (TE) and only the Electrode Metal (EM) is formed in a mesh type, a visibility problem may occur in which the outline of the Electrode Metal (EM) is visible on the display surface.
In contrast, as shown in fig. 14, in the case where or more Dummy Metals (DM) exist in the area of the Touch Electrode (TE), it is possible to prevent the visibility problem of the outline of the Electrode Metal (EM) on the display surface.
Further, the capacitance of each Touch Electrode (TE) can be adjusted to improve touch sensitivity by adjusting the presence or amount (dummy metal ratio) of the Dummy Metal (DM) of each Touch Electrode (TE).
Meanwhile, the cut Electrode Metal (EM) may be formed of the Dummy Metal (DM) by cutting points on the Electrode Metal (EM) formed in the area of Touch Electrodes (TE) — that is, the Electrode Metal (EM) and the Dummy Metal (DM) may be the same material formed in the same layer.
The touch display device according to an embodiment of the present invention may sense a touch based on a capacitance formed on a Touch Electrode (TE).
The touch display device according to an embodiment of the present invention may utilize a capacitance-based touch sensing method, which may sense a touch through a mutual capacitance-based touch sensing method or a self-capacitance-based touch sensing method.
In the case of a mutual capacitance-based touch sensing method, a plurality of Touch Electrodes (TEs) may be classified into a driving touch electrode (transmitting touch electrode) for applying a touch driving signal and a sensing touch electrode (receiving touch electrode) for detecting a touch sensing signal and forming capacitance with the driving touch electrode.
In the case of a mutual capacitance-based touch sensing method, a Touch Sensing Circuit (TSC) may detect the presence/absence of a touch and/or touch coordinates based on a change in capacitance (mutual capacitance) between a driving touch electrode and a sensing touch electrode generated according to the presence or absence of a pointer such as a finger, a pen, or the like.
That is, the Touch Sensing Circuit (TSC) applies a touch driving signal to or more Touch Electrodes (TE) and detects a touch sensing signal through the Touch Electrodes (TE) to which the touch driving signal is applied.
As described above, the touch display device according to the embodiment of the present invention may sense a touch through a mutual capacitance-based touch sensing method or a self-capacitance-based touch sensing method. Hereinafter, for convenience of explanation, a touch display device that performs touch sensing based on mutual capacitance and has a touch sensor structure for this purpose is described as an example.
Fig. 15 is a sectional view showing an example of a cross section of a display device according to an embodiment of the present invention.
Referring to fig. 15, a substrate 1100 may be divided into an active area 1000 and a pad area 2000. A thin film transistor, a gate line (not shown) for applying a gate signal to the thin film transistor, and a data line (not shown) for applying a data signal to the thin film transistor may be formed on the active area 1000. The substrate 1100 may be formed of polyamide, but is not limited thereto. In addition, a source electrode (not shown) and a drain electrode 111b of the thin film transistor may be formed when the data line is formed on the substrate 1100. The signal line 1110a extending from the pad region 2000 to the active region 1000 may be formed when the data line is formed. The signal line 1110a may be a pad 1010 exposed in the pad region 2000 and connected to an external device. However, the present invention is not limited thereto. The external device connected to the pad 1010 may be a data driver or a gate driver. The external device connected to the pad 1010 may be a Printed Circuit Board (PCB) on which the data driver and the gate driver are mounted, but is not limited thereto.
The planarization film 1120 may be formed on the drain electrode 1110b, the planarization film 1120 may be patterned, and the anode electrode 1130 disposed on the planarization film 1120 may be connected to the drain electrode 1110b disposed under the planarization film 1120, the bank 1140b may be formed on the anode electrode 1130 and the organic light emitting layer 1140a may be formed on the cavity formed in the bank 1140b, the cathode electrode 1150 may be formed on the bank 1140b on which the organic light emitting layer 1140a is formed, the bank 1140b in which the organic light emitting layer 1140a is formed in the cavity may be referred to as a light emitting layer, the cathode electrode 1150 may be a common electrode, the inorganic film 1160 may be formed on the cathode electrode 1150, when the inorganic film 1160 is formed, the bank 1120a may be formed at a portion where the pad area 2000 and the active area 1000 are adjacent to each other, the bank 1120a may be formed when the planarization film 1120a, furthermore, the bank 1120a may be a double-layer structure, when the inorganic film is formed, the bank a may be patterned using a mask, the bank 1120a may be disposed on the inorganic pad area 1110a, the signal area may be disposed under the inorganic pad area 1110, the signal area 1160, the signal area may be disposed on the inorganic pad area 1110a, the inorganic pad area 1100 a, the signal area may be disposed under the signal area 1160, however, the signal area may be disposed on the signal area 1110a, the signal area 1160 may be disposed on the inorganic pad area 1100, the inorganic pad area, the signal area may be disposed on the signal area 1110a, the signal pad area, the signal area 1160 may be disposed on the signal area.
the organic film 1170 may be formed on the the inorganic film 1160, the organic film 1170 may be disposed as a thick layer on the organic light emitting film 1140a to protect the organic light emitting film 1140a, thereby making it possible to prevent foreign substances such as moisture from penetrating into the organic light emitting film 1140a the inorganic film 1160 may have a restriction of to increase the thickness, and thus, by disposing the the organic film 1170 on the the inorganic film 1160 to increase the thickness, the organic light emitting film 1140a may be protected, and the the organic film 1170 may be prevented from penetrating into the pad region 2000 through the dam 1120 a.
The second inorganic film 1180 may be formed on the th organic film 1170, the second inorganic film 1180 may cover an upper portion of the dam 1120a formed by the th inorganic film 1160 and the planarization film 1120, the stacked th inorganic film 1160, th organic film 1170, and the second inorganic film 1180 may be referred to as an encapsulation or an encapsulation layer.
The touch buffer layer 1190 may be formed on the second inorganic film 1180. The touch sensor unit may be mounted on a package or an encapsulation layer by patterning touch electrodes on the package or the encapsulation layer. Damage to the encapsulation or encapsulation layer may occur during the formation of the touch electrodes on the encapsulation or encapsulation layer. To address this issue, a touch buffer layer 1190 may be formed on the encapsulation or encapsulation layer. The touch buffer layer 1190 may be formed of an inorganic film. The function of the touch buffer layer 1190 is not limited to preventing the encapsulation from being damaged in the process of forming the touch electrodes.
The th touch electrode 1210 and the second touch electrode 1230 may be formed on a touch buffer layer 1190. the th touch electrode 1210 and the second touch electrode 1230 may be a plurality of touch electrodes as shown in FIG. 3. the connection portion 322 may be disposed on a different layer from the plurality of touch electrodes. the touch insulating film 1220 may be disposed under the touch electrode 1230. a contact hole may be formed in the touch insulating film 1220. the second touch electrode 1230 may be connected to the th touch electrode 1210 through the contact hole. a 1240 passivation layer may be formed on the second touch electrode 1230. the passivation layer 1240 may be an organic film or an inorganic film.
The touch buffer layer 1190 and the second inorganic film 1180 may be formed by being patterned when the th touch electrode 1210 is formed, the signal line may be exposed by removing the second inorganic film 1180 and the touch buffer layer 1190 from the pad region 2000 using a patterning process.
After the th touch electrode 1210 is patterned, the touch insulating film 1220 is deposited, and then the second touch electrode 1230 may be patterned and formed on the touch insulating film 1220 at this time, the second touch electrode 1230 may be formed on the signal line 1110a exposed in the pad area 2000. furthermore, the signal line 1110a may be in contact with the second touch electrode 1230.
The above description and drawings provide examples of the technical concept of the present disclosure for illustrative purposes only. Those skilled in the art to which the present disclosure pertains will appreciate that various modifications and changes in form, such as combination, separation, substitution, and change of configuration, are possible without departing from the essential characteristics of the present disclosure. Therefore, the embodiments disclosed in the present disclosure are intended to illustrate the scope of the technical idea of the present disclosure, and the scope of the present disclosure is not limited by the embodiments. The scope of the present disclosure should be construed based on the appended claims, and by this means, all technical concepts included within the scope equivalent to the claims belong to the present disclosure.

Claims (14)

1, A display device, comprising:
a substrate including an active area in which pixels connected to gate lines and data lines intersecting each other are disposed, and a non-active area in which lines for transmitting signals for driving the plurality of pixels are disposed;
a touch signal generation circuit which is disposed on the non-active area and receives a touch clock signal and outputs a touch driving signal; and
a touch sensor unit for receiving the touch driving signal and generating touch information regarding a touch point on the active area.
2. The display device of claim 1, wherein a voltage level of the touch driving signal is higher than a voltage level of the touch clock signal.
3. The display device of claim 1, wherein the touch signal generation circuit comprises:
an th transistor having a th electrode connected to a th input terminal supplied with a th power supply, a second electrode connected to a th node, and a gate electrode connected to a second input terminal transmitted a th control signal;
a second transistor having a electrode connected to the th node, a second electrode connected to a third input terminal supplied with a second power source, and a gate electrode connected to a second node;
a third transistor having a electrode connected to the th node, a second electrode connected to the third input terminal to which the second power supply is input, and a gate electrode connected to a fourth input terminal to which a second control signal is transmitted;
a fourth transistor having a electrode connected to the input terminal through which the power is transferred, a second electrode connected to the second node, and a gate electrode connected to the input terminal;
a fifth transistor having an th electrode connected to the second node, a second electrode connected to the third input terminal, and a gate electrode connected to the th node;
a sixth transistor having an th electrode connected to a fifth input terminal to which the touch clock signal is input, a second electrode connected to an output terminal, and a gate electrode connected to the th node, and
a seventh transistor having an th electrode connected to the output terminal, a second electrode connected to the third input terminal, and a gate electrode connected to the second node.
4. The display device according to claim 1, wherein the inactive area is provided with a gate signal generating circuit for supplying a gate signal transmitted to the gate line.
5. The display device according to claim 1, wherein the substrate includes a light emitting layer and a package for packaging the light emitting layer, and the touch sensor unit is provided on the package.
6, A display device, comprising:
a display panel including an active area in which gate lines and data lines are disposed and which includes a plurality of pixels arranged in an area where the gate lines and the data lines cross each other, and a non-active area in which a touch signal generation circuit for receiving a touch clock signal and outputting a touch driving signal is disposed;
a display driving circuit for supplying driving signals corresponding to gate signals applied to the gate lines and data signals applied to the data lines;
a touch sensor unit including a plurality of touch electrodes for receiving the touch signal from the touch signal generation circuit and generating information on a touch point on the display panel; and
a touch driving circuit for supplying the touch clock signal to the touch signal generating circuit.
7. The display device of claim 6, further comprising: a gate signal generation circuit for receiving the drive signal from the display drive circuit and generating the gate signal.
8. The display device of claim 6, wherein the touch signal generation circuit comprises:
an th transistor having a th electrode connected to a th input terminal supplied with a th power supply, a second electrode connected to a th node, and a gate electrode connected to a second input terminal transmitted a th control signal;
a second transistor having a electrode connected to the th node, a second electrode connected to a third input terminal supplied with a second power source, and a gate electrode connected to a second node;
a third transistor having a electrode connected to the th node, a second electrode connected to the third input terminal to which the second power supply is input, and a gate electrode connected to a fourth input terminal to which a second control signal is transmitted;
a fourth transistor having a electrode connected to the input terminal through which the power is transferred, a second electrode connected to the second node, and a gate electrode connected to the input terminal;
a fifth transistor having an th electrode connected to the second node, a second electrode connected to the third input terminal, and a gate electrode connected to the th node;
a sixth transistor having an th electrode connected to a fifth input terminal to which the touch clock signal is input, a second electrode connected to an output terminal, and a gate electrode connected to the th node, and
a seventh transistor having an th electrode connected to the output terminal, a second electrode connected to the third input terminal, and a gate electrode connected to the second node.
9. The display device of claim 8, wherein the touch signal generation circuit does not receive the control signal, the second control signal, and the touch clock signal from the touch drive circuit in a th time interval, and receives the th control signal from the touch drive circuit without receiving the second control signal and the touch clock signal in a second time interval, and receives the touch clock signal from the touch drive circuit without receiving the th control signal and the second control signal in a third time interval, and receives the second control signal from the touch drive circuit without receiving the th control signal and the touch clock signal in a fourth time interval.
10. The display device of claim 6, wherein the touch sensor unit is connected to the touch signal generation circuit through a plurality of touch drive lines,
wherein the touch drive circuit supplies an th touch clock signal to a th touch drive line of the plurality of touch drive lines and a second touch clock signal to a second touch drive line adjacent to the th touch drive line, and
wherein the th touch clock signal and the second touch clock signal include a th time interval having the same phase and a second time interval having phases different from each other.
11. The display device of claim 10, wherein the touch drive circuit supplies a third touch clock signal to a third touch drive line adjacent to the second touch drive line of the plurality of touch drive lines and a fourth touch clock signal to a fourth touch drive line adjacent to the third touch drive line,
wherein the third touch clock signal and the fourth touch clock signal have the same phase as the th touch clock signal and the second touch clock signal, respectively, and are output to partially overlap with the th touch clock signal and the second touch clock signal.
12. The display device of claim 6, wherein a voltage level of the touch driving signal is higher than a voltage level of the touch clock signal.
13. The display device according to claim 6, wherein the display panel includes a light emitting layer and a package for packaging the light emitting layer, and the touch sensor unit is provided on the package.
14. The display device of claim 6, further comprising: and a control unit for controlling the display driving circuit and the touch driving circuit.
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